Arid
DOI10.1002/rra.2619
DRIVERS OF RIPARIAN TREE INVASION ON A DESERT STREAM
Reynolds, L. V.1,4; Cooper, D. J.1,4; Hobbs, N. T.2,3,4
通讯作者Reynolds, L. V.
来源期刊RIVER RESEARCH AND APPLICATIONS
ISSN1535-1459
EISSN1535-1467
出版年2014
卷号30期号:1页码:60-70
英文摘要

Understanding mechanisms of exotic species’ invasions is essential to managing riparian landscapes throughout the world. In the southwestern USA, the two most dominant invaders of riparian habitats are the exotic tree species tamarisk (Tamarix ramosissima, Tamarix chinensis, and their hybrids) and Russian olive (Elaeagnus angustifolia). These plants were introduced around 1900, and their success may be facilitated by river regulation, river channel changes, and precipitation patterns. We hypothesized that riparian invasion in Canyon de Chelly, Arizona, was initiated by a change point event such as plantings, dam construction, or channel incision and that establishment near a change point was tied to flood events. We aged tamarisk, Russian olive, and native cottonwood trees from study sites in Canyon de Chelly and used tree ring analysis to determine the year of establishment and the elevation of the germination point relative to the channel. We used Bayesian Poisson regression and information theoretics to identify change points and precipitation variables driving annual tree establishment. We found that most tamarisk and Russian olive trees established in the late 1980s, and most cottonwoods established in 1930-1950 and 1980-2000. Regression models indicated that change points occurred in 1983 for Russian olive and 1988 for tamarisk, and precipitation was important for establishment. Although plantings and river regulation probably played a role in tree invasion, our results suggest that these species required precipitation and stream channel change for widespread establishment in Canyon de Chelly. The factors driving riparian invasions may not be those often associated with degraded rivers, such as altered hydrographs and land management changes, thus requiring analyses of the full range of ecological and physical processes. Copyright (c) 2012 John Wiley & Sons, Ltd.


英文关键词Russian olive tamarisk floodplains exotic plant species invasive species Bayesian change point model
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000334409100006
WOS关键词SOUTHWESTERN UNITED-STATES ; COLORADO PLATEAU ; GREEN RIVER ; CHANNEL CHANGE ; GREAT-PLAINS ; FLOW REGIMES ; VEGETATION ; TAMARIX ; USA ; WATER
WOS类目Environmental Sciences ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Water Resources
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/184817
作者单位1.Colorado State Univ, Dept Forest & Rangeland Stewardship, Ft Collins, CO 80523 USA;
2.Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA;
3.Colorado State Univ, Dept Ecosyst Sci & Sustainabil, Ft Collins, CO 80523 USA;
4.Colorado State Univ, Grad Degree Program Ecol, Ft Collins, CO 80523 USA
推荐引用方式
GB/T 7714
Reynolds, L. V.,Cooper, D. J.,Hobbs, N. T.. DRIVERS OF RIPARIAN TREE INVASION ON A DESERT STREAM[J]. Colorado State University,2014,30(1):60-70.
APA Reynolds, L. V.,Cooper, D. J.,&Hobbs, N. T..(2014).DRIVERS OF RIPARIAN TREE INVASION ON A DESERT STREAM.RIVER RESEARCH AND APPLICATIONS,30(1),60-70.
MLA Reynolds, L. V.,et al."DRIVERS OF RIPARIAN TREE INVASION ON A DESERT STREAM".RIVER RESEARCH AND APPLICATIONS 30.1(2014):60-70.
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